Fire brick or block



comma R PLAsuc mm 11W 55 Patented Feb. 16, 1926.

UNITED STATES hxaminer 1,573,482 PATENT OFFICE.

RICHARD A. DAL'IAH, OI PHILO, OHIO.

FIRE BRICK OB BLOCK.

Io Drawing.

To all whom it may concern:

Be it known that I, RICHARD A. DALTA'N,

a citizen of the United'States, residing at Philo, in the county of Muskingum and State of Ohio, have invented certain new and useful Improvements in Fire Bricks or Blocks, of which the following is a s ecification.

My invention relates to a rick or block, to be used as a fire brick, and which will withstand the action of high heat.

In accordance with my invention, I produce a brick or block, which is capable of successfully withstanding the action of high heat, that is a temperature from 3400 F. to 4000F. The brick or block will not flux, and is highly resistant to the cutting action of'flame, and the abrasive action of the furnace charge, or swiftly moving dust laden gases. The brick can be produced at a less cost than the ordinary fire brick, and is much more durable.

In accordance with my invention, I produce a brick haying g body formed of the following materials, pre' erably combined in suistantially the proportions by weight state Parts by weight. 'Slag or cinders from a high temperature forced draft furnace 6 a Fire cement 2% ortland cement. ,4

It is essential that the slag or cinders be obtained from a high'tem rature furnace having a forced draft, an the slag or cinders cannot be properly used when .obtained from a furnace operated at a temperature beneath 2400 F. The slag or cinders should also 1m from. a furnace having a forced or blower draft, as in such a furnace, all of the ashes are blown out from the cinders or clinkers, which vary considerably in size. The slag or cinders, thus obtained, are allowed to cool, and are then suitably und. The slag or cinders, may vary om fine particles to about inch in size.

I have found that I cannot obtain satisfactory results by using slag or cinders from an ordinary low temperature furnace which slag or cinders may be present in a granulated form, as the same would be too expansive and would also absorb moisture. The slag or cinders from the high temperature forced draft furnace is free from these disadvantages, has a low coeflicient of expansion and does not r :1 abso b moist Fire cement is a cement which will not 5 Application filed m 16, 1025. Serial 10.80,!78. 2

set hard at atmospheric tem ratures, but does set hard, when subjec to heat, and may be heated to about 2600 F., and will then be found to have set hard. After it has set, it may be subjected to much higher temperatures, without injury.

The Portland cement is employed to cause the body of the brick to set sufliciently hard at atmospheric temperatures, so that it may be handled prior to being baked in the furnace.

The slag or cinders, fire cement, and Portland cement are thoroughly mixed with suflicient water to produce a lastic mass. which may be then intro uced into a suitable mold, or otherwise suitably worked into a block, constituting the body of the brick. This mass will set suificientl y hard at atmospheric temperatures, due to the presence of the Portland cement, to permit of the handling of the brick.

I also coat one, any, or all of the faces of the body of the brick. This embodies the following ingredients, pre erably combined in the following proportions:

Partsbyweight.

Granulated carborundum Fire cement 3% Portland cement ese ingredients are thoroughly mixed with suflicient water to produce a plastic mass. The facm'ces of the body of the brick is then coated with this com osition, to produce a face of about inc thick. The facing may be applied in any suitable manner, as is well known in the block molding art, and the facing composition may be first introduced into the bottom of the mold and the bod forming composition introduced into tile mold on top of the facin composition, and both compositions allowe to set and harden, at atmospheric tem eratures. If desired the body of the rick could be first formed and allowed to set and the facing or coating applied to the same, which would subsequent y be allowed to set. In the facin composition the Portland cement is employed to cause such facing and allowed to set an atmospheric temperatures, it is placed in a furnace and subjected to a temperature of about-EH11? for about 4 hours, and is then a owe to cool back to about 1200 E. and is retained at this temperature or about 5 hours. After being cooled back to 1200 F., the temperatures of the brick will then depend upon the temperatures of the furnace of which they form a part. After the brick have set at atmospheric temperatures, due to the Portland cement, they are built into the furnace of which they form a part and are burned or baked in this furnace, while of course the invention is in no sense restricted to this rocedure, as they could be baked or burne before being built into the furnace.

The brick thus produced will withstand from about 3500 F. to 3600 F. without fusing and lime life of the ordinary fire brick, when subjected to high temperatures, and may also be produced at a lower cost.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that the proportions of the in- -gradients may be somewhat varied, and

chemical equivalents employed, without departing from the spirit of my invention or the scope of the subjoined claims.

laim

\Having thus described my invention, I

1. A firebrick or block including a body portion, said body portion com IlSlIl" slag om a high temperature force draft furnace which is free from ashes, a fire cement which sets hard at a high temperature, Portland cementwhich sets hard at atmospheric temperatures, and a facin" composition comprising divided carborundum, a fire cement which sets hard at a high temperature, and Portland cement which sets hard at atmospheric temperature.

2. A fire brick or block containin slag from a high temperature forced dra t furnace, a high temperature setting fire cement, Portland cement, and divided carborundum.

3. A fire brick or block having a composition constituting a body portion of the same, said com osition comprising substan tially six parts. y weight of slag from a high tem rature forced draft furnace substantia y 2 parts by weight of a fire cement which sets hard at a high temperature, substantially ,4; art by weight of a cement which sets hard at atmospheric temerature, and a facing composition comprising substantially 4 parts by weight of granulated carborun um, substantially 3 arts by weight of a fire cement which'sets ard at a high temperature, and substantially part by weight of a cement which sets hard at atmospheric temperature.

4. A fire brick or block containin slag from a hi h temperature forced dra t furnace, a big temperature setting fire cement, and Portland cement.

. In testimony whereof I aflix my signature.

RICHARD A. DALTAN. 

